Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10156026 | Journal of Alloys and Compounds | 2019 | 26 Pages |
Abstract
Vanadium nitride (VN) has many applications ranging from structural materials to electrode material owing to its high hardness, excellent wear resistance, high electrical and thermal conductivity and high-temperature stability. The conventional synthesis methods are often plagued by high temperature (above 1000â¯Â°C) and long reaction times. In the paper, VN nanopowders are firstly synthesized by a large-scale, low-temperature and short-time solution combustion synthesis-based method. Firstly, vanadium dioxide (VO2) precursors are prepared through ultrafast (within one minutes) solution combustion synthesis method. During the subsequent ammonia reduction process, the VN nanopowders are successfully obtained at 700â¯Â°C for 2â¯h. In the investigation, the phase transformations and microstructures of precursors during ammonia reduction procedure have been studied in detail. The as-prepared VN nanopowders are composed of nanoparticles with particles sizes ranging from 30 to 40â¯nm and possess mesoporous structures. Upon evaluating the VN nanopowder as an anode material for lithium ion batteries, it displays good electrochemical performances and exhibits high reversible capacity of 634â¯mAh gâ1 at 0.1â¯Aâ¯gâ1 after 250 cycles.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Mingli Qin, Haoyang Wu, Zhiqin Cao, Deyin Zhang, Baorui Jia, Xuanhui Qu,